/* The About page. Plain static page: no script is needed to read it, and no outside address is used. */
@font-face { font-family: 'Fraunces Variable'; font-style: normal; font-display: swap; font-weight: 100 900; src: url('/fonts/fraunces-latin-wght-normal.woff2') format('woff2'); }
@font-face { font-family: 'Lato'; font-style: normal; font-display: swap; font-weight: 400; src: url('/fonts/lato-regular.woff2') format('woff2'); }
@font-face { font-family: 'Lato'; font-style: normal; font-display: swap; font-weight: 700; src: url('/fonts/lato-bold.woff2') format('woff2'); }
@font-face { font-family: 'Lato'; font-style: normal; font-display: swap; font-weight: 900; src: url('/fonts/lato-black.woff2') format('woff2'); }

:root {
  --bg: #F7F2E8; --surface: #FFFDF8; --surface-2: #F0E9DA; --ink: #12323A; --ink-2: #4B646B; --ink-3: #5E767C;
  --line: rgba(18, 50, 58, .14); --line-2: rgba(18, 50, 58, .26);
  --accent: #0E6F6A; --accent-2: #0A5753; --accent-ink: #FFFFFF; --accent-soft: #D7EEEA;
  --sun: #F2B134; --sun-soft: #FFF0CC; --sun-ink: #6B4300; --board: #14353D; --board-ink: #E9F2EE; --focus: #1D5FD1;
  --display: 'Fraunces Variable', ui-serif, Georgia, serif;
  --sans: 'Lato', ui-rounded, 'SF Pro Rounded', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0A1A1F; --surface: #10262C; --surface-2: #163239; --ink: #E8F2EE; --ink-2: #AFC4C4; --ink-3: #93AEB0;
    --line: rgba(190, 230, 225, .14); --line-2: rgba(190, 230, 225, .28);
    --accent: #4FD1BF; --accent-2: #38B9A8; --accent-ink: #062421; --accent-soft: #123A38;
    --sun: #FFC95C; --sun-soft: #3A2C0D; --sun-ink: #FFE3A1; --board: #0E2A30; --focus: #8CB6FF; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--ink); font: 1.0625rem/1.6 var(--sans);
  padding: max(14px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) 56px max(16px, env(safe-area-inset-left));
}
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: 10px; z-index: 5; font-weight: 700; }
.skip:focus { top: 10px; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-2); }
.wrap { max-width: 50rem; margin: 0 auto; }

/* ---------- Top ---------- */
.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 6px 0 14px; }
.top-links { display: flex; gap: 8px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand img { width: 40px; height: 40px; border-radius: 10px; }
.brand span { font: 640 1.15rem/1 var(--display); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 8px 18px; border-radius: 14px; border: 1.5px solid var(--line-2); background: var(--surface); color: var(--ink); font-weight: 700; text-decoration: none; }
.btn:hover { border-color: var(--ink-2); color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); color: var(--accent-ink); }

.hero { background: var(--board); color: var(--board-ink); border-radius: 26px; padding: 28px 24px 26px; margin: 4px 0 18px; }
.hero h1 { margin: 0 0 8px; font: 640 clamp(2rem, 7vw, 3rem)/1.05 var(--display); letter-spacing: -.01em; }
.hero p { margin: 0; max-width: 38rem; font-size: 1.1rem; opacity: .92; }
.glance { display: grid; grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr)); gap: 10px; margin: 20px 0 0; padding: 0; list-style: none; }
.glance li { background: rgba(255, 255, 255, .08); border-radius: 16px; padding: 10px 14px; }
.glance strong { display: block; font: 700 1.6rem/1.1 var(--display); }
.glance span { font-size: .9rem; opacity: .85; }
.hero .note { margin-top: 12px; font-size: .85rem; opacity: .75; }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 6px; padding: 5px; margin: 0 0 22px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 18px; position: sticky; top: 8px; z-index: 3; }
.tabs a { flex: 1; display: grid; place-items: center; min-height: 48px; padding: 6px 12px; border-radius: 13px; text-align: center; font-weight: 700; text-decoration: none; color: var(--ink-2); }
.tabs a[aria-selected="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 4px rgba(0, 0, 0, .12); }
.tabs a:hover { color: var(--ink); }

/* ---------- Reading ---------- */
h2, h3 { scroll-margin-top: 112px; }
h2 { margin: 2.4rem 0 .6rem; font: 640 1.6rem/1.2 var(--display); display: flex; gap: 12px; align-items: baseline; }
h2 .n { flex: none; display: inline-grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; background: var(--sun); color: #3A2600; font: 800 .95rem var(--sans); transform: translateY(-2px); }
h3 { margin: 1.6rem 0 .4rem; font: 700 1.1rem/1.3 var(--sans); }
p { margin: 0 0 1rem; }
ul, ol { margin: 0 0 1rem; padding-left: 1.3rem; }
li { margin-bottom: .45rem; }
.lead { font-size: 1.2rem; color: var(--ink); }
.muted { color: var(--ink-2); }
.source { margin: -.2rem 0 1.4rem; padding-left: 12px; border-left: 3px solid var(--line-2); color: var(--ink-3); font-size: .88rem; line-height: 1.5; }
.callout { background: var(--sun-soft); color: var(--ink); border: 1.5px solid var(--sun); border-radius: 18px; padding: 14px 18px; margin: 0 0 1.2rem; }
.callout p:last-child { margin-bottom: 0; }
.card { background: var(--surface); border: 1.5px solid var(--line); border-radius: 18px; padding: 14px 18px; margin: 0 0 1rem; }
code { font: .9em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--surface-2); padding: .1em .35em; border-radius: 6px; }

.table-wrap { overflow-x: auto; margin: 0 0 .8rem; border: 1.5px solid var(--line); border-radius: 16px; background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: .95rem; min-width: 34rem; }
caption { text-align: left; padding: 10px 14px 4px; font-weight: 700; color: var(--ink-2); font-size: .85rem; letter-spacing: .04em; text-transform: uppercase; }
th, td { text-align: left; vertical-align: top; padding: 9px 14px; border-top: 1px solid var(--line); }
thead th { border-top: 0; font-size: .82rem; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-2); }
tbody th { font-weight: 700; white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.group th { background: var(--surface-2); font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); }

.points { list-style: none; counter-reset: pt; margin: 0 0 1.2rem; padding: 0; display: grid; gap: 10px; }
.points li { counter-increment: pt; position: relative; margin: 0; padding: 14px 16px 14px 62px; background: var(--surface); border: 1.5px solid var(--line); border-radius: 16px; }
.points li::before { content: counter(pt); position: absolute; left: 16px; top: 13px; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; background: var(--sun); color: #3A2600; font: 800 1rem var(--sans); }
.refs { font-size: .95rem; }
.refs li { margin-bottom: .7rem; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--ink-3); font-size: .9rem; }
footer .row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 12px; }

@media (max-width: 520px) {
  body { font-size: 1rem; }
  .hero { padding: 22px 18px; border-radius: 22px; }
  h2 { font-size: 1.4rem; }
}
@media print {
  body { background: #fff; color: #000; }
  .top .btn, .tabs, .skip, footer .row { display: none !important; }
  [role="tabpanel"] { display: block !important; }
  .hero { background: #fff; color: #000; border: 1px solid #000; }
  .glance li { background: #eee; }
  a { color: #000; }
  h2 { break-after: avoid; }
  .table-wrap { break-inside: avoid; border-color: #888; }
}